Subversion Repositories open8_urisc

/* ffs -- Find the first bit set in the parameter
 
@deftypefn Supplemental int ffs (int @var{valu})
 
Find the first (least significant) bit set in @var{valu}.  Bits are
numbered from right to left, starting with bit 1 (corresponding to the
value 1).  If @var{valu} is zero, zero is returned.
 
@end deftypefn
 
*/
 
int
ffs (register int valu)
{
  register int bit;
 
  if (valu == 0)
    return 0;
 
  for (bit = 1; !(valu & 1); bit++)
  	valu >>= 1;
 
  return bit;
}